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As the amount of carbon in steel increases, its ____________ increases.

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As the amount of carbon in steel increases, its ____________ increases.

(a) ductility

(b) impact resistance

(c) hardness

(d) weldability

The question was posed to me in final exam.

I'd like to ask this question from Properties of Steel and its Alloys topic in chapter Steel and its Alloys of Aerospace Materials & Processes

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The correct choice is (c) hardness

Explanation: Addition of carbon in a substance changes its properties. When the amount of carbon present in a material increases, its hardness also increases. Ductility, impact resistance and weldability decrease.

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